Question

3. Which of the following is a singleton set?
(A) P= {x\x² = 49, xeI}
(B) Q = {y|y2 + 5 = 2y2 + 4, yel}
(C) R={m\meI, mº = 27}
(D) S = {nın- 25 =0}​

Answer 1

Answer:

A) P = {x|x^2=49,x€I}

7^2=49

P={7}

Therefore, set P is a singleton set.